This device has little to no effect on my Migraine headaches. I used the device when I believed to have the "Onset" of a migraine headache and it failed to "abort" the headache. I have also tried the Cefaly Dual device and it had little effect on the overall migraine cycle. However while I use the Cefaly it seems to provide some temporary relief. I do not get any relief from migraine pain at all when I use the Nerivio device, so it is basically a waste of time. I also do not like the idea of only having 12 treatments and then I have to replace the device for about $50. For about $50 I can buy 6 electrodes to use with the Cefaly Dual device. The Cefaly device is rechargeable and lasts for years. I would rather keep using the Cefaly Dual device because I think it is more cost effective for me than the Nerivio device. Update: Apparently after the company received my review they weren't pleased with it. The company emailed me asking if I would consider "revising" it. They suggested that since I had more time with the device since I submitted my original review, I therefore should have a more positive opinion of it. Here are their exact words: "Thank you for your review. Would you mind revising it or changing your rating now that you have had time to get to know your Nerivio device a little better?" I was not pleased with their response to my honest review suggesting that I should "revise" it because I had the product longer. Their response makes me feel like I don't know what I'm talking about. What I know for sure is that the device doesn't work for me. The way the device stimulates the nerves in my arm is ineffective at treating my migraine attacks. What I do not like is the company expecting me to write a better review after having the device longer because the original review makes their product look bad. I first started using the device at the end of March and I believe that I had it long enough to know whether it works for me or not. I so far used the device 8 times and haven't noticed any reduction in migraine pain, even when I use it at or near the "onset" of the attack. The device is not going to suddenly work after 8 failed treatments. I made the following changes to my survey responses: "How did you communicate with the company?": I changed my response to email because my doctor sent in my Nerivio prescription to you and you responded by sending me an email. I clicked the link in the email to complete the enrollment process and got an error that the data entered was invalid and that I needed to call. I then called and completed the enrollment process. So I communicated with the company via Email and Telephone. "How would you rate the customer service you received?": I changed my rating from "Very Good" to "Very Poor" because of the company's response to my negative review of their product. The Nerivio device may be simple to use, but the Cefaly device is even simpler. The Cefaly device requires no app to use and activates with a push of a button. Apparently Trigeminal neurostimulation works better for my migraines, and whatever nerve that the Nerivio device stimulates doesn't work at all.